Is the president retarded? Why would he ask Wakou to help with this?
I've been thinking about it, and I think the president's plan can work if what he's really doing is setting Menka up to have her ego destroyed. He knows she destroyed Wakou's confidence and walked away without facing any consequences. Now he's forcing her to work side by side with the man she broke, but that man has changed.
Wakou has three wives, he's over his ED, and he doesn't need her validation anymore. He's thriving without her, and she'll be forced to watch it firsthand as they work together to carry out this plan. If he shows that he's completely over her, it could deal a heavy blow to her ego. It could work even better if she ends up falling for him in the process.
Also, Menka has always been the one using men, but in this plan, she's the one being used. The president is using her as a tool for corporate espionage, and the son of the other company's president will probably use her as a toy. Menka isn't the one pulling the strings. For once, she's the pawn, not the player, and she's too arrogant to even realize it.
With this plan, the president gets his corporate espionage handled, humbles a woman who deserves it, and gives Wakou the closure he never got. I think he could be playing a calculated game, and Menka doesn't even realize she's the pawn because she's too focused on the pot of gold at the end of the rainbow.
So yeah, I guess it can work if the author handles it well... which I'm not too confident about, to be honest.